C6.6 Marine Generator Set Caterpillar

Removal Procedure

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Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.

Note: Put identification marks on all hoses, on all hose assemblies, on wires and on all tube assemblies for installation purposes. Plug all hose assemblies and tube assemblies. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

1. The engine can have the ability to auto start. Ensure that the power supply is isolated before any service or repairs is performed.

2. Turn the fuel supply to the OFF position.

3. Turn the battery disconnect switch to the OFF position.

4. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
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   Illustration 1	g01374098
   Typical example

5. Rotate the crankshaft until rocker arms (1) for the appropriate cylinder are in the correct position in order to adjust the valve lash. Refer to Systems Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".

6. Follow Steps 6.a through 6.d in order to gain access to the electronic unit injector.

   1. Make a temporary mark on valve bridges (5) in order to show the location and orientation.

      Note: Identification will ensure that the valve bridges can be reinstalled in the original location and the original orientation.

   2. Loosen nuts (3) for the appropriate cylinder. Unscrew adjusters (2) for the appropriate cylinder until pushrods (4) can be withdrawn from the balls of the adjusters.

   3. Withdraw the cups of pushrods (4) from the balls of adjusters (2).

   4. Remove the valve bridges from the cylinder head.

      Note: Do not interchange the location or the orientation of used valve bridges.

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   Illustration 2	g01742614

7. Loosen banjo bolt (6) sufficiently in order to allow the fuel to drain from tube assembly (7).
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   Illustration 3	g01255699
   The rocker shaft is not shown for clarity.

8. Remove the fuel injection line and remove seal (8) from the appropriate electronic unit injector (11). Refer to Disassembly and Assembly, "Fuel Injecton Lines - Remove".

   Note: Cap all open ports immediately with new caps.

9. Use a deep socket to remove connections (10) from electronic unit injector (11).

10. Slide rocker arms (1) to one side in order to gain access to torx screw (12). Use Tooling (B) in order to remove the torx screw from clamp (13). Discard the torx screw.

    Note: Tooling (B) must be used to ensure no damage to the rocker arms.

11. Place a temporary identification mark on the original electronic unit injector. The electronic unit injector must be reinstalled in the original location in the cylinder head.
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    Illustration 4	g01742613
    The rocker shaft is not shown for clarity.

12. Use Tooling (C) to pry beneath clamp (13) and free electronic unit injector (11) from the cylinder head.

13. Remove electronic unit injector (11) and clamp (13) from the cylinder head.

    Note: Always handle electronic unit injectors with care.

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    Illustration 5	g01255701
    Typical example

14. Remove sealing washer (14) . Ensure that the sealing washer is removed from the cylinder head. Remove O-ring seal (15) from the electronic unit injector.

Alternative Removal Procedure

Start By:

1. Remove the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft - Remove".

2. Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injecton Lines - Remove".

Note: This is an optional procedure to remove the electronic unit injectors. The method should ONLY be used when all electronic unit injectors are removed and when the engine is removed from the application.

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Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.

Note: Put identification marks on all hoses, on all hose assemblies, on wires and on all tube assemblies for installation purposes. Plug all hose assemblies and tube assemblies. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

1. Turn the fuel supply to the OFF position.

2. Turn the battery disconnect switch to the OFF position.
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   Illustration 6	g01621539

3. Loosen banjo bolt (6) sufficiently in order to allow the fuel to drain from tube assembly (7).
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   Illustration 7	g01255699

4. Place a temporary identification mark on connections (10) for harness assembly (9).

5. Use a deep socket to remove connections (10) from electronic unit injector (11).

6. Use Tooling (A) in order to remove torx screw (12) from clamp (13). Discard the torx screw.

7. Place a temporary identification mark on the original electronic unit injector. The electronic unit injector must be reinstalled in the original location in the cylinder head.
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   Illustration 8	g01742613

8. Use Tooling (B) to pry beneath clamp (13) and free electronic unit injector (11) from the cylinder head.

9. Remove electronic unit injector (11) and clamp (13) from the cylinder head.

   Note: Always handle electronic unit injectors with care.

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   Illustration 9	g01255701
   Typical example

10. Remove sealing washer (14). Ensure that the sealing washer is removed from the cylinder head. Remove O-ring seal (15) from the electronic unit injector.

11. Repeat Steps 4 through 11 in order to remove the remaining electronic unit injectors.